Stand on the BOSU with feet slightly wider apart than shoulder width and toes pointing straight forward.
Fix your position and pay attention to a neutral position of the pelvis.
From the starting position, go down flexing your knee and hip joints, without changing the spine curvature. Guide your knees in the direction of your toes during the movement. Keep your body core firm and do not bend forward too much. In the lower position your pelvis drops to knee level. Keep your balance using your arms and keep your shoulder blades and shoulders fixed correctly. From the squat, jump straight up and then land back on the BOSU into a squat. Inhale in the lower position and exhale in the jump.
Pay attention to body posture, a firm body core and a neutral position of pelvis. Avoid excessive bending at the waist.
Keep your knees in the direction of your toes and avoid swinging your knees when overcoming the resistance. Your knees, trunk and head should not go beyond the fictitious toe line.
Avoid excessive bending forward when going own.
Keep your body upright in the jump phase.
Exercise sideways to a mirror to check and correct the technique.